TI SOC based PWM Subsystem
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Required properties:
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- compatible: Must be "ti,<soc>-pwmss".
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for am33xx - compatible = "ti,am33xx-pwmss";
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for am4372 - compatible = "ti,am4372-pwmss","ti,am33xx-pwmss";
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for dra746 - compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss"
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- reg: physical base address and size of the registers map.
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- address-cells: Specify the number of u32 entries needed in child nodes.
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Should set to 1.
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- size-cells: specify number of u32 entries needed to specify child nodes size
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in reg property. Should set to 1.
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- ranges: describes the address mapping of a memory-mapped bus. Should set to
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physical address map of child's base address, physical address within
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parent's address space and length of the address map. For am33xx,
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3 set of child register maps present, ECAP register space, EQEP
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register space, EHRPWM register space.
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Also child nodes should also populated under PWMSS DT node.
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Example:
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epwmss0: epwmss@48300000 { /* PWMSS for am33xx */
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compatible = "ti,am33xx-pwmss";
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reg = <0x48300000 0x10>;
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ti,hwmods = "epwmss0";
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#address-cells = <1>;
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#size-cells = <1>;
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ranges = <0x48300100 0x48300100 0x80 /* ECAP */
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0x48300180 0x48300180 0x80 /* EQEP */
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0x48300200 0x48300200 0x80>; /* EHRPWM */
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/* child nodes go here */
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};
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epwmss0: epwmss@48300000 { /* PWMSS for am4372 */
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compatible = "ti,am4372-pwmss","ti,am33xx-pwmss"
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reg = <0x48300000 0x10>;
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ti,hwmods = "epwmss0";
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#address-cells = <1>;
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#size-cells = <1>;
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ranges = <0x48300100 0x48300100 0x80 /* ECAP */
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0x48300180 0x48300180 0x80 /* EQEP */
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0x48300200 0x48300200 0x80>; /* EHRPWM */
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/* child nodes go here */
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};
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epwmss0: epwmss@4843e000 { /* PWMSS for DRA7xx */
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compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss";
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reg = <0x4843e000 0x30>;
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ti,hwmods = "epwmss0";
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#address-cells = <1>;
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#size-cells = <1>;
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ranges;
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/* child nodes go here */
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};
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